Weighing-scale



(No ModeL) M. G. 000K.

WEIGHING SCALE.

No. 327,530. Patented Oct. 6, 1885.

Wii E 5 5 E5. 2.4

N. PETERS. Phomiilhagnphcr, Wuhing'orl. D. (L

UNITED STATES PATENT OFFICE.

MOSES G. COOK, OF LYNN, MASSACHUSETTS.

WElGHlNG-SCALE.

SPECIFICATION forming part of Letters Patent No. 327,530, dated October6, 1885.

Application filed May 2. 1884. Serial No. 130,162. (No model.)

To all whom it may concern.-

Be it known that I, Mosns G. Coon, of

Lynn, county of Essex, State of Massachusetts,

have invented an Improvement in Scales, of which the followingdescription, in connection with the accompanying drawings, is aspecification, like letters on the drawings representing like parts.

This invention relates to certain improvements in Letters Patent No.267,776, granted to me, and to J os. N. Smith, as the assignee ofone-half interest, on the 21st day of November, 1882.

As fully set forth in that patent, to which reference is made for a fulland detailed description of all the parts of the scale, the weights,which may be successively lifted by the inclined weight-lifting devicewhenever an article is to be weighed, are provided with lateralprojections or holding-lugs, which rest in notches in theweight-supporting bars, and are also caught in notches in the inclinedweightlifting device when the latter is raised by means of the weightplaced in the proper weighing-pan.

Other than the notches in the weight supporting and lifting devices nomeans are pro vided in said patent to prevent displacement of theweights by reason of sudden movement or jars imparted to the scale, andin usage I have often seen the necessity for providing against suchdisplacement.

My present invention has for its object to prevent the displacement ofthe weights by reason of any sudden movement or jars imparted to thescale, and to insure their constant engagement with the proper notchesof either the weight-supporting bars or weight-lifting device as thescale is at rest or in action.

My invention has for its further object to simplify the connection andoperation of the parts which convey motion from the scalebeam to thepointer, which operates in connection with the graduated dial.

The nature of these improvements is fully set-forth in the followingdescription, and particularly pointed out in the claim.

Figure l is a front elevation of a scale containing my invention; Fig.2, an end view thereof; Fig. 3, a section on line y y of Fig. 2, to moreclearly show the weight-actuating parts and the rod which completes theconnection of the pointer with the scale-beam; and Fig. 4, a detailillustrating the pointer-actuating mechanism.

The scale-beam a, pivoted on the standards I), having the pans c f,standards (1 g, radiusbars 6 t, and frame h and guidep, are of the construction described in the patent referred to.

In this instance the movable frame h, pivoted, as shown, to the lowerend of the stand ard g, is provided with two parallel weightliftingplates, j, preferably of the form shown in Fig. 2-that is to say, withhorizontal or straight upper surfaces and inclined lower surfaces, andprovided with vertical slots j of graduallyincreasing length from end toend of the plates, all of said slots, however, being of substantiallythe same width.

Aline parallel with the horizontal upper edges of the plates willintersect the upper terminals or ends of the slots, and a second linedrawn at an acute angle to the first line but parallel with the loweredges or bottoms of said plates will intersect the lower terminals ofsaid slots, and consequently said slots will vary in length. The lowerterminals of the slots will be successive] y brought to a given level asthe frame is raised by the depression of the platform 0 at the other endof the scale.

The stationary frame-work, rigidly secured to the base, as shown, isprovided with slationary weight-supporting bars 7:, notched at theirupper edges to correspond in position and manner with the slots in theplates j.

In the normal position of the scale the inclined bottoms of the platesjare maintained wholly below the upper surface of the weightsupportingbars 1;, with the lower terminal of the shortest slot of said plates,which corre sponds to the highest notch mentioned in the patent referredto, on a level with or just beneath the corresponding notch at the leftof the said bars, viewing Fig. 2.

The weights on are of the construction set forth in the patent referredto, and their proj ections a pass through the slots j in theweight-lifting plates 9', and rest in the notches of theweight-supporting bars 7.. By this construction the projections orcannot escape from the slots in the plates j, and whenever, by theoperation of the apparatus, the said projections are lifted from thenotched bars 7tand then lowered they will always be returned to theirrespective notches; besides, whatever the jar or sudden movement thatmay be imparted to the scale, the slotted plates j will constantlyretain the weights in proper posi tion and cause them to be returned totheir respective notches in the supporting-bars, as stated.

The weights are provided with notches 0, as shown in dotted lines, Fig.8, which in cooperation with the guide 17, mounted on the framework,serves to place them in proper position between the supporting-bars Itas they are deposited thereon upon the depression of the slotted plates7' A depending connecting-rod, r, is pivoted to the scale-beam a at apoint between its central pivots, 2, and the standard and the lower endof said rod is attached to a pin, r,

- secured to the pointer-actuating lever s and projecting through a slotin the back of the dial-case S.

The pointer-actuating lever s is pivoted at one end within thedial-ease, as at 4, (see Fig. 4,) and is provided at its opposite endwith a number of teeth, 8, which engage the pinion a: on the arbor t, tooperate the pointer a, which co-operates with a dial, 1;, having theseries of concentric graduated circles, the said pointer thus receivinga movement corre sponding with the movement of the scalebeam.

The movement of the pointer with relation to the dial and other parts ofthe scaleis fully described in the patent mentioned herein,and needs nofurther description.

The pocket 16 for the lever s is secured within the case S, with one endsupporting the arbor t and the other end the pivot 4, as well as beingintended to prevent lateral swing or play of the lever s, as will beclearly understood upon inspection of Fig. 4. of the drawings.

It will be noticed that the depending rod is connected with thepointer-actuating lever between the pivotal and toothed ends of thesame.

The dial-ease is mounted on the base of the scales.

In. the present instance I employ but sixteen weights,and make the outercircle of the dial in half-ounce divisions up to eight ounces, insteadof to sixteen, as heretofore; and, further, change the letter postagecircle from three cents per half-ounce to two cents per half-ounce,toconform to the present rates for letter postage.

Providing the weight lifting plates with slots, as shown atj, to receiveand hold the projections of the weights renders it impossible for theweight to get back into any other notch of the bar it, except the onefrom which it was lifted, no matter how carelessly the scale is handledin weighing.

The V-shaped pivot-bearings 2 (see Figs. 2 and 3) of the scale-beama,projecting from the sides of the beam and resting in the tops of thestandards 0, are covered by caps a (see Fig. 1,) attached to thestandards I) by screws 8, and each of the said caps a is provided withan adj listing-screw, a, bearing against the ends of the pivots 2, sothat by movement thereof the scale-beam may be moved laterally, the endsof the said screws a" also acting against the ends of the pivot-bearings2 to form stops for the same and prevent any reciprocation or lateralsliding of the beam as the scale is being used.

I claim- In a scale or weighing apparatus, the co'mbination, with thescale-beam having the pivoted frame h, provided with weight-liftingplates having slots of increasing length in suecession, with the upperslot terminals in line with one another, of horizontal weight-supportingbars secured in a weight-receptaele, and having notches corresponding innumber and position with the slots in the lifting-plates, and a seriesof weights provided with projections passing through the slots in theliftingplates and resting in the notches of the supportingbars andadapted to be lifted therefrom by the slotted plates in the movement ofthe scale-beam, substantially as described.

ln testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

MOSES G. COOK.

Vitnesses:

B. J. NoYns, V. H. Si'es'roX.

